Changes In Population

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Across
  1. 4. tiny producers that live in water
  2. 5. A ______ is all the organisms of a given species that live together in the same area
  3. 6. a volcano in the state of Washington that erupted in 1980
  4. 10. to live well and have your population increase.
  5. 11. a species that is not native to an ecosystem is called this:
  6. 12. a soft young rock
  7. 14. an animal that hunts other animals
  8. 16. stone formations that look like bones of old dead animals
  9. 18. a slow-flowing river of ice
  10. 19. a large deer-like animal that lived on Isle Royale
Down
  1. 1. _____ anchor themselves to solid surfaces, including other organisms.
  2. 2. when an entire species has died it has suffered an _____
  3. 3. this rock is made mostly of sand
  4. 7. The population of the moose had _____ by 1930.
  5. 8. a pressed layered rock
  6. 9. an animal that is hunted by other animals
  7. 13. the collection of all living and nonliving things and there interactions
  8. 15. food is a limited ______ in an ecosystem
  9. 17. a pack-hunting predator